What are the issues of monocropping in agriculture and how could inputting hedgerows improve this?

The natural environment is a symbiosis of thousands of species. For a given area, the variety of species is called its biodiversity. An environment with a high biodiversity is often describes as healthy. This is partly because it is more resilient to changes: with a whole team of species within it, all with different strengths and weaknesses, it is much more able to adapt to challenges. A monocrop field is not a team environment. It is one, lone species with one set of strengths and weaknesses, hence the amount of work it requires to look after it and make it grow well is a full-time job, and often requires the use of pesticides and herbicides. If the monocrop field is challenged against one of its weaknesses, then it could quickly fail. This could be through disease, harsh weather, soil degradation and pests. Hedgerows can help alleviate these issues a little. They provide habitats for different plant species and insects to live (increasing biodiversity). These insects can help with the crop fertilization and soil health. The various plants will provide structures that can act as wind or sun shield for the crops and their diverse root systems can help keep the soil together- avoiding soil erosion. Lastly, they add to that beautiful natural scenery.